See: Description
| Interface | Description | 
|---|---|
| BroadcastHandle<T> | Handle to a broadcast. | 
| ReducerHandle<S,R> | Handle to a reducer. | 
| Class | Description | 
|---|---|
| ReducerAndBroadcastWrapperHandle<S,R> | Handle that wraps both reducerHandle and broadcastHandle, so callers
 don't need to have two fields. | 
| ReduceUtilsObject | Utility object with common primitive reduce operations,
 without need to create reusable objects within the piece. | 
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